package nio;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;

public class HelloClient {
	    public static String host = "127.0.0.1";
	    public static int port = 7878;
	
	    /**
	     * @param args
	     * @throws InterruptedException 
	     * @throws IOException 
	     */
	    public static void main(String[] args) throws InterruptedException, IOException {
	        EventLoopGroup group = new NioEventLoopGroup();
	        try {
	            Bootstrap b = new Bootstrap();
	            b.group(group)
	            .channel(NioSocketChannel.class)
	            .handler(new HelloClientInitializer());
	
	            // 连接服务端
	            Channel ch = b.connect(host, port).sync().channel();
	            
	            // 控制台输入
	            BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
	            for (;;) {
	                String line = in.readLine();
	                if (line == null) {
	                    continue;
	                }
	                /*
	                 * 向服务端发送在控制台输入的文本 并用"\r\n"结尾
	                 * 之所以用\r\n结尾 是因为我们在handler中添加了 DelimiterBasedFrameDecoder 帧解码。
	                 * 这个解码器是一个根据\n符号位分隔符的解码器。所以每条消息的最后必须加上\n否则无法识别和解码
	                 * */
	                ch.writeAndFlush(line + "\r\n");
	            }
	        } finally {
	            // The connection is closed automatically on shutdown.
	            group.shutdownGracefully();
	        }
	    }

}
